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经验估计     
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  empirical estimation
     The Empirical Estimation of the Water-soil Partition Coefficient of Organic Contaminants in Subsurface Environment
     地下环境中有机污染物土壤-水分配系数的经验估计方法
     Due to the correlation of local decisions is not known, empirical estimation is adopt to resolve this problem, the relationship of the training sample size and the estimated confidence is analyzed.
     对局部采用硬判决的情况,深入研究了传统的分析方法,利用经验估计解决了局部观测相关系数未知时存在的困难,分析了系统判决精度与估计样本数量的关系。
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     Secondly, when the joint pdf is unknown, empirical estimation is adopted to solve this problem, the relationship of the training sample size and the estimated confidence is analyzed.
     对于联合概率密度未知的情况,深入研究了传统的分析方法的不足之处,利用经验估计解决了局部判决相关系数未知时存在的困难,分析了系统判决精度与估计样本数量的关系。
短句来源
     With mathematical equivalence transformation, the indeterminatefactors in conventional criterion can be replaced by empirical estimation and recurreneceformula of subsample mean.
     通过等价数学变换,利用常规经验估计和子样均值递推公式。
短句来源
     Empirical Estimation of Fraction of the Year at Death of Chinese Life Table
     中国生命表中终寿年成数的经验估计
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  empirical estimates
     This paper reviews the methodology of calibrating stable isotope fractionation factors by means of theoretical calculations,experimental determinations and empirical estimates,and discusses the influences of temperature,pressure,chemical composition,crystal structure and salt concentration in solution on isotopic fractionation.
     文中评述了稳定同位素分馏系数校准的理论计算、实验测定和经验估计方法 ,讨论温度、压力、化学成分和晶体结构等对矿物同位素性质的影响。
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  empirical evaluation
     THE EMPIRICAL EVALUATION OF SOIL MODULI AND DAMPING RATIO FOR DYNAMIC ANALYSIS
     土的动模量和阻尼比的经验估计
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  “经验估计”译为未确定词的双语例句
     In order to solve the problem of error distribution in optical measurement, the experiments are used to certify the distribution.
     为解决光学检测中的误差分布问题 ,提出了用实验方法验证其分布 ,而不是简单地依据经验估计其分布为均匀分布、三角分布或正态分布。
短句来源
     (2) the upstream conditions are all taken from the calculation results of Ref. [2], except the Y12F is assumed by the author.
     (2)也由于流场上游的边界条件不是实验测量的,除了湍流结构系数Y12F是作者凭经验估计的以外都是用的文献[2]的计算结果;
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     As an important quantificational index for maintainability,the predication method and algorithm of mean time to repair(MTTR) are always dependent on experimentation and experience.
     平均修复时间(MTTR,Mean Time To Repair)作为一个重要的维修性定量指标,目前其预计方法及算法立足于大量的试验结果和经验估计.
短句来源
     Traditional uncertainty analysis is mostly based on experimental statistic and experience estimation, and no mathematical relation is found between the colour temperature uncertainty and the spectral irradiance values.
     采用传统方法得到的计算结果偏高,这是因为传统的计算方法很大程度上基于实验和经验估计,没有将颜色温度的不确定度与光谱辐射功率和色品坐标(u,v)的不确定度之间建立明确的数学关联,在分析过程中存在对某一不确定度源进行重复计算的可能。
短句来源
     empirical Euclidean penalized likelihood based on an unbiased estimating function and an empirical estimator;
     基于一个无偏估计函数和一个历史经验估计的经验Euclidean惩罚似然方法;
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  empirical estimate
A method is presented for approximate calculation of conductive-radiative heat transfer in bundles of heat-releasing rods, and an empirical estimate is given of the effective thermal conductivity.
      
The observed score equations from the approximation are biased and hence are adjusted by subtracting an empirical estimate of the expected value.
      
By analysing a synthetic tidal record an empirical estimate of the variation of the error in the M2 component with record length is obtained.
      
Area and Age of Secondary Forests in Brazilian Amazonia 1978-2002: An Empirical Estimate
      
For direct satellites the new result agrees with Kuiper's empirical estimate that such satellites are stable up to a distance of half the "radius of action" of the planet.
      
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  empirical estimation
We develop an experimental process to measure the dynamical parameters for a single mode CO2 laser which is independent from usual empirical estimation.
      
Measurements of the half-lives of43Cr and46Mn have been performed and the analysis of their measured beta-delayed proton spectra has given, through the isobaric multiplet mass equation, an empirical estimation of their masses.
      
The empirical estimation accounts for this endogeneity using data from the Panel Study of Income Dynamics.
      
This paper discusses the structure and empirical estimation of the County Employment Forecasting System (CEFS), a system used to forecast employment for 32 sectors for each one of the nine counties of the San Francisco Bay Region.
      
An empirical estimation of regional production functions for the U.S.
      
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  empirical estimates
Empirical estimates of shock compression parameters for porous materials
      
A universal method is suggested that provides empirical estimates of the kinetic coefficients in the equations of quasiparticle transfer in crystalline structures.
      
Empirical estimates were used to check the reliability and mutual consistency of literature experimental data on the enthalpies of formation and entropies of several ferrocene derivatives.
      
Scenario analysis of potential spatial transformations of the Russian economy: Procedural approach and empirical estimates
      
Here we consider in detail semi-empirical estimates of the ESR spectra parameters: isotropic hyperfine coupling constants, anisotropic hyperfine coupling tensors and g-tensors.
      
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  empirical evaluation
An empirical evaluation of deadlock detection in software architecture specifications
      
Cultural values as determinants of executive attitudes on decision making: An empirical evaluation
      
Finally, we present an empirical evaluation of bounded-overhead cache performance, relying on a specially designed experimental methodology that separates hardware-dependent, implementation-dependent, and domain-dependent effects.
      
Our empirical evaluation confirms theoretical prediction, showing that on low-w* problems DR is very efficient, greatly outperforming the backtracking-based Davis-Putnam-Logemann-Loveland procedure (DP).
      
Local Search Algorithms for SAT: An Empirical Evaluation
      
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The Yangtze river boats are one of the special type of boats in our country.For many years our shipbuilders have gained much experience and success in the design and construction.Their general arrangements and hull structures,have been carefully studied,with special attention to the narrow waters,rushing current,curved course and beaches etc.of the river.So,an excellent type of Yangtze river boats of light weight,strong structure,small draft,large cargo capacity,good maneuverability and high speed is needed.Besides,the...

The Yangtze river boats are one of the special type of boats in our country.For many years our shipbuilders have gained much experience and success in the design and construction.Their general arrangements and hull structures,have been carefully studied,with special attention to the narrow waters,rushing current,curved course and beaches etc.of the river.So,an excellent type of Yangtze river boats of light weight,strong structure,small draft,large cargo capacity,good maneuverability and high speed is needed.Besides,the depth of the river changes with seasons,the ship may be used all the year round. This paper is a summation of the building experience of five Yangtze river boats which were built during the period forward of 1958. The principal dimensions and characteristics of the five boats are: Length over all 71.20m.;Displacement 1376T; Breadth,max.15.00m.;Passengers and crew 544; Depth moulded 5.80m.;Speed 14 knots. The author analysed some of the key points of technical problems,which oceured in the building process and some conclusions are as follows: 1.The reasonable choice of the sectional positions is very important to the thin plating structure like the Yangtze river boats,the double bottom section of longitudinal system in general should be sectioned. 2.The measurement of pre-distortion is a ratter simple,economical and effective means for mini- mizing the welding distortion.This may be recommended to all sections,the value of predistortion may be chosen by experience or by calculation. 3.Joining the structure parts of the super-structures by the use of CO_2 gas protected welding may result less distortion and more production.The quality of the wavelike structure is closely dependent on the shape of the mold. 4.The shaft strut is positioned and assembled to the hull on the shipway after itself being complctep as a whole on the support mold floor.This was proved to be an advaneed technique by the building practices of the several Yangtze river boats.Since the assembly-time being cut to 1/3,and therefore the shipway time is shortened by this sequence. In addition,a few suggestions to improve the structures in further design are also made.These may be used as references for designing and construction of the same type of boats.

长江船舶是我国特有的一种船型。多年来,我国的造船家在设计和制造这种特殊船舶时取得了许多经验并获得了相当成就。如对船舶进行了合理的布置;有效地迭用和安排了船体结构。并考虑到江面狭窄、水流湍急、航道迂回曲折、险滩多等特点,选取了良好船体绕型,从而得到了:船体轻、结构牢固、吃水浅、载重量大、敏转性能好以及航速高的优秀的川江船舶。此外,因江水深度随季节变化甚大,故设计时应考虑“枯水”及“洪水”两种不同吃水,可以全年通行无阻。本文主要总结了1958年大跃进时制造的五艘同型川江客轮船体的建造经验,并作了全面的分析和探讨,并得出下列结论:1.送择合理的分段划分位置对薄板结构的长江船舶有着重要意义。纵结构的双重底分毀,除在起重能力受到限制外,一般应以环形划分为宜。2.焊接船体分段采取反变形来减少变形,这是既简单又有效的方法,值得在各分段上推广应用。反变形数值的送择可根据实践累积经验估计或理论计算得出。3.文内提出上层建筑的连接可广泛采用 CO_2气体保护焊,以减少变形、提高生产率。围壁的波形结构加工质量与模具形状有着直接关系。4.后艉轴支架采取在胎架上整体组成后,再到船台定位安装的方珐,经过几艘川江客轮的实践证明...

长江船舶是我国特有的一种船型。多年来,我国的造船家在设计和制造这种特殊船舶时取得了许多经验并获得了相当成就。如对船舶进行了合理的布置;有效地迭用和安排了船体结构。并考虑到江面狭窄、水流湍急、航道迂回曲折、险滩多等特点,选取了良好船体绕型,从而得到了:船体轻、结构牢固、吃水浅、载重量大、敏转性能好以及航速高的优秀的川江船舶。此外,因江水深度随季节变化甚大,故设计时应考虑“枯水”及“洪水”两种不同吃水,可以全年通行无阻。本文主要总结了1958年大跃进时制造的五艘同型川江客轮船体的建造经验,并作了全面的分析和探讨,并得出下列结论:1.送择合理的分段划分位置对薄板结构的长江船舶有着重要意义。纵结构的双重底分毀,除在起重能力受到限制外,一般应以环形划分为宜。2.焊接船体分段采取反变形来减少变形,这是既简单又有效的方法,值得在各分段上推广应用。反变形数值的送择可根据实践累积经验估计或理论计算得出。3.文内提出上层建筑的连接可广泛采用 CO_2气体保护焊,以减少变形、提高生产率。围壁的波形结构加工质量与模具形状有着直接关系。4.后艉轴支架采取在胎架上整体组成后,再到船台定位安装的方珐,经过几艘川江客轮的实践证明,是先进的工艺。应用新工艺后,安装时间仅为原来的1/3,从而大大缩短了船台安装日期。此外,对今后船体结构设计方面提出若干改进建议,可供同类型船舶设计和制造时参考。

In this paper the Extended Hucker Method is adopted and the Cluster model is used to calculated the surface relaxation of the Si (111) plane. The calculation shows that the surface atoms will be displaced inward with respect to their "ideal" positions by an amount of 0.10A. This expectation is in better agreement with the experimental results than previous empirical evaluations and theoretical calculations.

本文用原子集团模型和推广的Hueker方法研究Si(111)面的表面弛豫,得到表面Si原子向体内弛豫 0.10的结论,改进了已有的经验估计和理论计算结果,与LEED的分析结果符合较好。

This paper reviews the history of development of stress/strain observation, expounds the role played in dam technique and high darn surveillance by stress/strain observation,and indicates that it will be an important measure for water resources development and concrete structure surveillance. On the basis of estimating its accuracy according to foreign and domestic experience, the author proposes the constant current method to ensure the observation accuracy and suggests some research projects on this observation...

This paper reviews the history of development of stress/strain observation, expounds the role played in dam technique and high darn surveillance by stress/strain observation,and indicates that it will be an important measure for water resources development and concrete structure surveillance. On the basis of estimating its accuracy according to foreign and domestic experience, the author proposes the constant current method to ensure the observation accuracy and suggests some research projects on this observation technique.

本文概述了应力应变观测的发展过程,说明了它在发展坝工技术和监测高坝安全中的作用,指出了它是今后开发水电资源和进行混凝土建筑物安全监测的重要科研手段,有必要进一步加以研究和应用。文中根据国内外经验估计了应力应变观测的精度,提出了运用恒流法检测装置和仪表保证长期观测精度的建议及今后改进应力应变观测技术的研究内容。

 
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